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Jack Christensen adbb38f298 Do not allow protocol messages larger than ~1GB 
The PostgreSQL server will reject messages greater than ~1 GB anyway.
However, worse than that is that a message that is larger than 4 GB
could wrap the 32-bit integer message size and be interpreted by the
server as multiple messages. This could allow a malicious client to
inject arbitrary protocol messages.

https://github.com/jackc/pgx/security/advisories/GHSA-mrww-27vc-gghv
 		2024-03-04 09:09:29 -06:00
..
README.md Move pgproto3 to subdirectory 2022-02-21 11:57:34 -06:00
main.go Move pgproto3 to subdirectory 2022-02-21 11:57:34 -06:00
server.go Do not allow protocol messages larger than ~1GB 2024-03-04 09:09:29 -06:00

README.md

pgfortune

pgfortune is a mock PostgreSQL server that responds to every query with a fortune.

Installation

Install fortune and cowsay. They should be available in any Unix package manager (apt, yum, brew, etc.)

go get -u github.com/jackc/pgproto3/example/pgfortune

Usage

$ pgfortune

By default pgfortune listens on 127.0.0.1:15432 and responds to queries with fortune | cowsay -f elephant. These are configurable with the listen and response-command arguments respectively.

While pgfortune is running connect to it with psql.

$ psql -h 127.0.0.1 -p 15432
Timing is on.
Null display is "∅".
Line style is unicode.
psql (11.5, server 0.0.0)
Type "help" for help.

jack@127.0.0.1:15432 jack=# select foo;
                   fortune
─────────────────────────────────────────────
  _________________________________________ ↵
 / Ships are safe in harbor, but they were \↵
 \ never meant to stay there.              /↵
  ----------------------------------------- ↵
  \     /\  ___  /\                         ↵
   \   // \/   \/ \\                        ↵
      ((    O O    ))                       ↵
       \\ /     \ //                        ↵
        \/  | |  \/                         ↵
         |  | |  |                          ↵
         |  | |  |                          ↵
         |   o   |                          ↵
         | |   | |                          ↵
         |m|   |m|                          ↵

(1 row)

Time: 28.161 ms